FORAMINIFEEA OF THE NOETH PACIFIC OCEAN. 25 



Voy. Challenger, Zoology, vol. 9, 1884, p. 199, pi. 11, figs. 5-9— Balkwill 

 and Wright, Trans. Roy. Irish Acad., vol. 28 (ScL), 1885, p. 326, pi. 12, 

 figs. la-b. — Eggeb, Abhandl. bay. Akad. Wise. Munchen, Cl. ii, vol. 18, 

 1893, p. 247, pi. 3, figs. 20, 21.— Fornasini, Mem. Accad. Sc. Istit. Bologna, 

 eer. 5, vol. 3, 1893, p. 431, pi. 1, fig. 4.— Goes, Kongl. Svensk. Vet. Akad. 

 Handl., vol. 25, 1894, p. 106, pi. 18, fig. 834; Bull. Mus. Comp. Zool., vol. 

 29, 1896, p. 79.— Morton, Proc. Portland Soc. Nat. Hist., vol. 2, 1897, p. 

 114, pi. 1, fig. 16— Millett, Journ. Roy. Micr. Soc, 1898, p. 612.— Bagg, 

 Proc. U. S. Nat. Mus., vol. 34, 1908, p. 123. 



Description. — Test flattened, early portion of the tubular chamber 

 of nearly uniform dimensions, but in later development rapidly in- 

 creasing in height and forming a broad flat test; wall smooth except 

 for occasional thickenings over the lines of growth; aperture a long 

 slit the entire height of the tubular chamber. 



Diameter of North Pacific specimens hardly more than 2 or 3 mm. 



Distribution. — Goes records Cornuspira foliacea from two Albatross 

 stations in the eastern tropical Pacific, one D3375 in 1,201 fathoms 

 and the other only the depth is given, 700 fathoms. 



There is apparently no mounted Pacific material in Goes's col- 

 lection. 



Bagg records it from off the Hawaiian Islands, not common at 

 Albatross station D4017 in 309 fathoms. His single mounted speci- 

 men from this station which I have examined seems to be immature, 

 but is undoubtedly this species. The only material I have had be- 

 longing definitely to this species is from Albatross station D4900 in 

 139 fathoms, off Japan, bottom temperature 52.9° F. 



In the Challenger report Brady speaks of this species as more com- 

 mon in the Atlantic than elsewhere, and it certainly, from the material 

 I have had, appears to be decidedly uncommon in the North Pacific. 



Both microspheric and megalospheric forms occur. 



CORNUSPIRA INVOLVENS (Reuss). 

 Plate 1, fig. 2; plate 2, fig. 2. 



Operculina involvens Reuss, Denkschr. Akad. Wise. Wien, vol. 1, 1849, p. 370, 

 pi. 45, fig. 20. 



Cornuspira involvens Reuss, Sitz. Akad. Wiss. Wien, vol. 48, 1863 (1864), p. 39, 

 pi. 1, fig. 2.— Jones, Parker, and H. B. Brady, Pal. Soc., vol. 19, 1866, 

 p. 3, pi. 3, figs. 52-54. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 200, pi. 11, figs. 1-3. — Balkwill and Millett, Journ. Micr., vol. 3, 

 1884, p. 23, pi. 1, fig. 1. — Balkwill and Wright, Trans. Roy. Irish Acad., 

 vol. 28, 1885, p. 327, pi. 12, fig. 2.— H. B. Brady, Parker, and Jones, 

 Trans. Zool. Soc., vol. 12, 1888} p. 216, pi. 40, figs. 1-3.— Sherborn and 

 Chapman, Journ. Roy. Micr. Soc., 1889, p. 484, pi. 11, figs. 4, 5. — Egger, 

 Abhandl. bay. Akad. Wiss. Munchen, Cl. n, vol. 18, 1893, p. 246, pi. 3, 

 figs. 18, 19— T. Rupert Jones, Pal. Soc, 1895, p. 128, pi. 3, figs. 52-54.— 

 Morton, Proc. Portland Soc. Nat. Hist., vol. 2, 1897, p. 114. — Millett, 

 Journ. Roy. Micr. Soc., 1898, p. 612. — Chapman, Journ. Linn. Soc. Zoology, 

 vol. 30, 1907, p. 22, pi. 2, fig. 46— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908; 

 p. 123. 



53709°— Bull. 71, pt. 6—17 3 



